Helicopter Rotor Wake Investigations on a Wind Tunnel Model with Varying Blade Stub Lengths

Hartmann, Ulrich; Breitsamter, Christian

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Hartmann2023

Title:: Helicopter Rotor Wake Investigations on a Wind Tunnel Model with Varying Blade Stub Lengths
Document type:: Konferenzbeitrag
Contribution type:: Textbeitrag / Aufsatz
Author(s):: Hartmann, Ulrich; Breitsamter, Christian
Abstract:: Experimental and numerical investigations have been performed on a helicopter wind tunnel model for three rotor heads with different blade stub lengths. This investigation analyzes the origin and the development of the wake structures occurring from the various blade stub lengths and their interaction with the tail section of the helicopter to judge the influence of the blade stub spanwise dimension on drag, lift and pitching moment characteristics. Therefore, aerodynamic forces and moments and the wake flow fields are analyzed by experimental and numerical simulations. The origin of the distinct structures is identified by the numerical simulations. Specific cross flow planes in the wake captured experimentally the flow field and allowed a comparison with the numerical results. The numerical investigations are based on the unsteady Reynolds-averaged Navier-Stokes equations. The turbulence is modeled by the scale-adaptive simulation method and the rotation of the rotor head is modeled by the sliding mesh approach. The flow field of the experiment and the simulation showed good agreement and a detailed analysis of the dominant vortices propagating downstream is performed. Copyright © 2023 by the Vertical Flight Society. All rights reserved. «
Experimental and numerical investigations have been performed on a helicopter wind tunnel model for three rotor heads with different blade stub lengths. This investigation analyzes the origin and the development of the wake structures occurring from the various blade stub lengths and their interaction with the tail section of the helicopter to judge the influence of the blade stub spanwise dimension on drag, lift and pitching moment characteristics. Therefore, aerodynamic forces and moments and... »
Dewey Decimal Classification:: 620 Ingenieurwissenschaften
Book / Congress title:: FORUM 2023 - Vertical Flight Society 79th Annual Forum and Technology Display
Date of congress:: 16 May 2023through 18 May 2023
Publisher:: Vertical Flight Society
Year:: 2023
Covered by:: Scopus
Print-ISBN:: 978-171387479-9
Language:: en
WWW:: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85167699511&partnerID=40&md5=c7546b1bc754cb20e856704f71d166aa
Notes:: Funding text The authors want to thank ANSYS for providing the flow simulation software. The author gratefully acknowledge the Gauss Centre for Supercomputing e.V. for funding this project by providing computing time on the GCS Supercomputer SuperMUC-NG at Leibniz Supercomputing Centre. The research leading to the results received funding by the Federal research programme aeronautics LuFo VI-2 within the project NANNY with the Grant Agreement Number FKZ20Y2109.
TUM Institution:: Lehrstuhl für Aerodynamik und Strömungsmechanik
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